Complete disinfection of drinking water systems, cold and hot, of water mains and storage tanks. Chemical, thermal or combined, with full sanitary documentation meeting PSSE and PSP requirements.
Hot and cold water systems are an environment where biofilm, Legionella and other microorganisms thrive. Dead legs, stagnant water, an inadequate hot water temperature or ageing pipework are all risk factors that call for action.
The Ministry of Health regulation and sanitary inspectorate guidance impose an obligation to disinfect regularly on public buildings, hospitals, hotels, swimming pools and workplaces.
Inspection of the system, a survey of draw-off points, identification of dead legs and stagnation zones. Assessment of hot and cold water temperatures.
Disinfection using the chosen method (thermal, ClO₂, shock chlorination or a combination). Full exposure of every draw-off point.
Water sampling before and after disinfection. Analysis at the accredited GBA Polska laboratory. Full documentation for Sanepid.
Mandatory disinfection of hot and cold water — Legionella, the sanitary inspectorate and regular reports.
A critical environment — full documentation and a Legionella risk management plan.
Disinfection of hot and cold water risers for property managers and housing associations.
Pool installations and communal showers — disinfection and microbiological monitoring.
Process water, cooling systems, storage tanks and cooling towers.
Handover of a system after construction — disinfection before it is signed off for use and first filled.
Responsibility for the water ends at the meter. The water utility is responsible for water parameters up to the service connection boundary, whereas the owner or manager of the building is responsible for drinking water quality inside it. This applies to housing associations and housing cooperatives, hotels, hospitals, schools, swimming pools and workplaces.
The obligation follows from the Collective Water Supply Act and from the Regulation of the Minister of Health on the quality of water intended for human consumption. The State Sanitary Inspectorate may inspect the system and, where microbiological parameters are exceeded, issue a decision on conditional fitness of the water or ban its consumption. In practice this means an obligation to disinfect the drinking water system and to document the result.
The most common reason for a sanitary inspectorate decision is Legionella bacteria in the domestic hot water system. If testing has confirmed its presence, we start with Legionella removal, not with flushing the system alone.
A new drinking water system is not clean. During installation, swarf, traces of jointing compound, dust and water from pressure tests, which can stand in the pipework for weeks, all find their way into the pipes. Standard PN-EN 806-4 requires the system to be flushed before it is handed over for use, and disinfected in justified cases.
The procedure has four stages: preliminary flushing, filling the system with a disinfectant solution at a set concentration, holding it for the required contact time, then final flushing and water testing. We document concentrations, times and temperatures, so the report is fit for the handover file and for a sanitary inspection.
Here we work with developers, main contractors and installation companies. The date usually follows the handover schedule, so it is worth booking the job together with the pressure tests rather than after them.
We do not publish a price list, because two buildings of the same floor area can differ several times over in cost. The quotation is individual and free of charge, and it depends above all on:
For a quotation we only need the type of building, the number of risers and whether you have a current water testing. If not, we can take the samples during our first visit.
The Ursynów tunnel in Warsaw , disinfection of the fire protection system, the largest of its kind in the city. Chopin Airport , hydrant inspections at a site with the highest sanitary and technical requirements. Aquanet , inspection of 10 kilometres of the western DN 1000 water main, commissioned through a public tender.
We apply the same documentation standard in a block of flats and in a hotel. We have been in business since 2009, in Mazovia and the neighbouring provinces.
The procedure has four stages: preliminary flushing, filling the system with a disinfectant solution at a set concentration, holding it for the required contact time, and final flushing completed with water testing. Every draw-off point must be exposed to the agent, otherwise bacteria survive in dead legs and the system is recontaminated within a few weeks. The whole job is carried out to PN-EN 806-4, with concentrations, times and temperatures documented.
There is no single best one. Systems carrying water intended for consumption are treated with agents approved for contact with drinking water: sodium hypochlorite, chlorine dioxide or hydrogen peroxide. Chlorine dioxide copes better with biofilm and works across a wider pH range, shock chlorination is cheaper and faster, and thermal disinfection introduces no chemicals into the system but requires an efficient heat source. We choose the method after an inspection, not over the phone. Household remedies such as vinegar or baking soda do not remove biofilm and give no basis for a report.
A tank is disinfected in two stages: first mechanical cleaning of the walls and floor to remove sediment and biofilm, then disinfection with an agent approved for contact with drinking water and flushing until residues are gone. Chemical treatment alone, without removing the sediment first, is ineffective, because the agent does not reach bacteria hidden under the layer of deposits. Storage tanks, pressure vessels and hot water buffers are covered as part of disinfecting the whole system.
Concentration and contact time are matched to the condition and volume of the system, not taken from a table. Shock chlorination uses concentrations many times higher than in mains water with a shorter contact time, while low concentration disinfection needs a dozen or more hours. What matters is measuring the concentration at the furthest draw-off point, because that is what determines effectiveness, not the concentration at the dosing point. After treatment the system is flushed until residues are gone and the water is tested in a laboratory.
The time depends on the size of the building and the number of risers. A standard block (10 floors, 4 stairwells) usually takes 4–8 hours. The water is off in the section being disinfected while the work is under way. We agree the schedule with the property manager or administrator at least 72 hours in advance.
No — disinfection does not require the building to be emptied. During the procedure itself we temporarily shut off the water supply to the riser or section concerned. Residents receive advance notice of the planned interruption.
We provide complete documentation: a disinfection report with the technical parameters, a results sheet (concentrations, temperatures, exposure time), the GBA Polska laboratory analysis report, a schematic of the system marking the sampling points, and a certificate of completion. The documents are recognised by the sanitary inspectorate, Sanepid and the fire service.
Yes — we disinfect water service connections, deep wells, balancing tanks and estate networks. For new sections of network we carry out the required disinfection before technical acceptance and connection to the municipal network.
For public buildings (hotels, hospitals, swimming pools) — at least once a year, or after any unfavourable test result. For apartment blocks — recommended every 2–3 years, or after the pipework has been refurbished. The exact frequency depends on microbiological test results and the Legionella risk assessment.
We work across Mazovia, Łódź, Podlasie and the Lublin region. We reply the same working day.
